package week10;

import java.util.*;
import java.util.Map.Entry;

public class Main4 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in 

);

		Map<String, Integer> map = new HashMap<String, Integer>();

		// Set<String> set = new TreeSet<String>();
		while (sc.hasNextLine()) {
			String str = sc.next();
			if (str.equals("!!!!!")) {
				break;
			} else {

				if (map.get(str) == null) {
					map.put(str, 1);
				} else
					map.put(str, map.get(str) + 1);
			}
		}

		List<Map.Entry<String, Integer>> list = new ArrayList<Map.Entry<String, Integer>>(map.entrySet());
		Collections.sort(list, new Comparator<Map.Entry<String, Integer>>() {

			@Override
			public int compare(Entry<String, Integer> o1, Entry<String, Integer> o2) {
				if (o1.getValue() == o2.getValue()) {
					return o1.getKey().compareTo(o2.getKey());
				}
				return o2.getValue() - o1.getValue();
			}

		});
		System.out.println(map.size());
		int num = 0;
		for (Map.Entry<String, Integer> m : list) {
			if (num == 10)
				break;
			System.out.println(m.getKey() + "=" + m.getValue());
			num++;
		}

		sc.close();

	}

}
